Question
Does the eyeball mean I can report on how many times an email is viewed?
Answer
The eyeball icon is a tracker of how many times the recipient opened the email.
If you are looking for more data on these views, you can add the field Views of My Last Email to a smart list. This will let you create a view of individuals who have viewed your most recent emails.
For more information, see these articles: Monitoring email open rate and link clicks and Tracking your communication channels in Sell.